The exhaust pipe includes: front section of muffler, three-way catalyst, exhaust manifold and rear section of muffler. The muffler we usually talk about refers to the rear section of the muffler, so the exhaust pipe includes the muffler. The temperature of the exhaust pipe varies from 300 ℃ to 80 ℃ when driving on the highway. The closer to the engine, the higher the temperature.

Rust of exhaust pipe is not caused by high temperature. It is because the steel gradually loses the protective coating and rust in the process of cold and hot alternation. In short, the original protective coating is lost due to high temperature or alternating cold and hot, and rust occurs at room temperature.

Ordinary high temperature resistant paint will lose its antirust effect or mechanical properties after the alternation of cold and heat. Most high temperature resistant antirust paints are designed for long-term high temperature operation equipment with infrequent temperature changes. It can not adapt to the working condition that the exhaust pipe is often subject to cold and hot alternation and impact.

If you want to paint the exhaust pipe without peeling off the paint, you must use the paint special for the exhaust pipe. This is a heat-resistant paint special for the exhaust pipe system and muffler components, which is suitable for the protection of the exhaust pipe and muffler of motorcycles and agricultural machinery. High temperature paint has very good heat resistance, mechanical properties and salt spray resistance.